Tire-inflation gauge



Aug- 31, 1926. I 1,597.668

H. BRIER TIRE INFLATION. GAUGE.

' Filed. Dec. 24. 192:,

Patented" Aug. 31, I I

: unifies- ATE f 1 HENRY'IlBRIER, or miitrroan,fnnenenn.

mea t m aves;

Applicationfile'd December 254', 1923', Serial No. 682,400, andGreatQBritain March 21, 1 923.

This invention relates to inflation gauges to provide an instrumentwhichwill register as nearly as possible the degree of. inflation, of thetire, and thus indicate when the tire is properly inflated,theti'ndi'cations of said gauge being, in effect, measurementsof'the'indentation or resistance to of the outer wall ofthe tires.

Several embodiments of the inventiogh are illustrated in the'accompanying drawings in which Figs. 1,2 and 3 are, respectively,

a plan, "a longitudinaljsection and a cross section of a gauge includingatire engaging plunger PIOVldBdWltll a rack meshing with a pinionconnected With an arm with a pointer traversing a dial. 1 a

' Fig. 4 1S aplan of a gauge having internal mechanism similar to thatillustrated in Figs. 2 and 3 and having a pointer operated by an arm andposed milled quadran't'for engagementwith the finger.

' controlled pointer.

Figs. 5 and dareeleva'tions at "right angles to one another of a gaugeincluding operating with a pointer, Fig. 5, being partto oneanother of aEach of the gauges shown inFigs. 1 to 8 comprises a plunger 1 mountedWithin a casing "2 having alaterally extending. abutmerit face 3penetrated by the operative end of the plunger and adapted to be broughtagalnst the outer wall of a tire,

The plunger 1 is urged by a spring-.4 in

opposition to which it is moved inwardly of the casing 2 by reactionpressure of the tire.

In, the embodiments illustra'ted'in Figs. 1, 2, 3 and the plunger isformed at 5 as a rack engagmg a pinion 6 the. arbor ofwhich is revolublymounted in' the casing 2 and provided with an arm 7 having aoneway'connectiori with a loose pointer 8,; the arrangement being suchthat the extent of inward movement of the plungeris registered by thepointer on the dial 1. Forsetting the pointer at zero there is provided,in the embodiment illustrated in Figs. '1, 2 a'nd3, a. finger knob v9connected to the I pointer; for setting the pointer at zero in n tati nengageable -arm 11 isso shaped at its provided with a partlyex-i thelong end. to

the enrbo diment illustrated in .Fig. 4 there provided a milled'quadrant9 integral" t quadrant projects through .a-'- gap in the cas forpneumatic tires and has forlitsobject in J y Referring totheembodimentillustrated. in Figs?) and 6, the plungeris constituted"-by".a ball l engaged by the'arms] 11, 12 of 'nection :with a pointer;8".

tion' virith the, deflecting spring lever 7 3 The arms 11, 12 areishapeds he o the lever 8,? provides th 's'one way connec toconform with f the.spherical surface offth'e ball, the arm 7 is depressed. and the-arm 12.being acted on- 11 being acted onbyfthe 'ball whenl theball O by" theballwhenthe ball is being restored to norn'ial position byithefspring4:. r The the ballis depressed the-lever 7" is mo'ved outwardly byengagement with thebzill and the adjacent end of thelever', while 011':the

of the'lever 12 is scale. The one-way action 'betweenp the levers "7andB iharked) on the levers 7 and formed. r

In; the operation is. insured. by a-s'topj (not lever 8 lt' will' be'seen i that the tubular body 2 is split and that the S fare Imounted. intheslit' ofv the guage shown in' end that vvhen" *outward movement ofthe ball, the short end 4 I pushed laterally, causing move inwardly.over the 80..

Figs. .5 and 6, the ball 1 is"depressed by i i the reaction of thewa'llf the tire. in oppo- L sition to the spring 4,the bifurcated springlever 11, 12 and therewith the pointer-.18 bcing 'caused totrarversejthe scale 1. The

pointer is subsequently. setat zerobyjman ual operation.

and 8, the pointer 8? is fixed to an arbor 15 mountedforrockingmovement'in the In the embodiment illustrated in Figs. 7

casing Q and carrying a follower cam 14f engageabl'e by. the plunger '1,the arrangeplunger '1 is accompanied by corresponding movement ofthepointer across the dial 14 remains at maximum indication; A spring.

Washer 9 mentflbeing such that the movement of the "when the plunger 1is restored to friction toprevent unintended movement-of that themovement of the pointer in propor tion to the travel of the plunger 1 isgradually increased as the plunger moves over the innermost part of itsrange.

What I claim is 1. An inflation gauge for pneumatic. tires comprising acasing having a part engageable with the outer wall of the tire, ayielding resistance member Within said casing, a fire-engaging plungerprqectmgbeyond sa d casing part and movable in said casing-1n oppositionto said resistance, an indicator having a one-Way connection operableonly on movement of said plunger inwardly of the casing and a scale forthe. indicator graduated to indicate the degree of inflation of thetire.

2. An inflation 'auge for pneumatic tires comprising a casing havingapart engageable with the outer Wall of a tire, a spring within saidcasing, a tire-engaging plunger projecting, beyond said casing part andmov- 'able in said casing inopposition to said spring to anextentdetermined by resistance to indentation offered by the tire, anangularly movable indicator operatively connected to said plunger and ascale for the indicator graduated to indicate the degree of in-' fiationof the tire.

3. An inflation gauge for pneumatic tires comprisingacasing having apart engage able with the outer Wall of the tire, a resistance memberwithin the casing, a ti-reen-1 gaging plunger projecting beyond said casing part and movable in said casing in opposition to said resistancetoan'extent determined by the resistance to indentation of fered by thetire to said plunger, an anguface adapted to be brought against theouter larly movable indicator, means for transmitting movement of saidplunger to said in-,

dicator and a scale for the indicator gradu ated to indicate thedegree'ofinflationof the tire. i r v fl. An inflation gauge forpneumatic tires comprising a casing having an abutment wallof a tire, atire-engaging plunger protruding beyond said :tace and movable 1nu'ardlyof said casing by the reaction pressure of the tire, a spring' withinsaid casing urging said plunger in outward direction,

.wall of the tire, a tire-engaging plunger protruding beyond said faceand movable inwardlyof said casing by the reaction pressure of the tire,a spring within said casing urging said plunger outwards but compres;

sihle-by said plunger to balance the pressure I of. the tire againstsaid plunger; an angularly movable indicator, one-Way motiontransmittingconnection; displaced by compression of said spring, 0 rable only-onmovement of the plunger inwardly of the casing between said plunger andsaid indicatorand a scale for the indicatorg'radui ated to indicate thedegree of inflation of the tire. i

- 16. An inflation gauge for pneumatic tires,

comprising a tire-engaging abutment adapted to engage theouter wall ofthe tire, a tireeng'aging member movablerelatively to said '80"abutment, resilient means pressing saidgmember against. the tire,s'aid'means being compressible'onvrelative movement of said member andsaid abutment to balance the reaction pressure 'of'thetireyanindicating, do vice movable to an extent determined by the compressionof said; resilient means and a scale cooperating "therewith graduated toindicate the degree of inflationjof the tire.

In testimony whereof I. have signed, my name to this specification. v f

